Anna Tadevosyan; Mahsa Daryadar; Anahit Tovmasyan; Armenuhi Asatryan; Hamid Reza Roosta; Anahit Hakobjanyan
Abstract
Moringa oleifera Lam. is a well-known medicinal plant and food source. It is rich in bioactive substances, has several pharmacological properties, and is an introduced species to Armenia. This study aimed to evaluate moringa for adaptability to Armenian climatic conditions while assessing its antioxidant ...
Read More
Moringa oleifera Lam. is a well-known medicinal plant and food source. It is rich in bioactive substances, has several pharmacological properties, and is an introduced species to Armenia. This study aimed to evaluate moringa for adaptability to Armenian climatic conditions while assessing its antioxidant and antibacterial activities in different cultivation systems. Moringa plants were grown in soil and hydroponic systems (on specific substrates: volcanic slag, gravel, volcanic slag mixed with gravel). We examined growth characteristics, yield, antioxidant activity, and antibacterial properties. The results showed that moringa can adapt to the Armenian climate. It is important to note that leaf dry mass increased by 1.6-1.7 fold in hydroponic-grown plants compared to soil-grown plants, regardless of the growth substrate. We observed a higher antioxidant activity in plants that grew on gravel only and gravel mixed with volcanic slag substrates. A comparative study of the antibacterial activity of moringa leaf water extract revealed that the plant extract (5000 µg mL-1) in hydroponic conditions suppressed the growth of gram-positive (Enterococcus hirae) and gram-negative (Escherichia coli) bacteria in 24 hours. Soil-grown plants had similar extracts by concentration that inhibited the growth of gram-negative bacteria. Thus, moringa plants adapted to the Armenian climate. The plants performed better in the hydroponic system than in the soil system. This superiority in performance appeared in plant growth, yield, antioxidant activity, and antibacterial properties.
Peiman Mohit Rabary; Zahra Movahedi; Mehdi Ghabooli; Majid Rostami
Abstract
As a micronutrient, zinc (Zn) plays an essential role in various physiological processes of plants. Here, acclimatized samples of valerian (Valeriana officinalis L.), chicory (Cichorium intybus L.), withania (Withania. coagulans) and purple coneflower (Echinacea purpurea L.) were evaluated under aeroponic ...
Read More
As a micronutrient, zinc (Zn) plays an essential role in various physiological processes of plants. Here, acclimatized samples of valerian (Valeriana officinalis L.), chicory (Cichorium intybus L.), withania (Withania. coagulans) and purple coneflower (Echinacea purpurea L.) were evaluated under aeroponic system conditions in order to explore the effects of zinc oxide nanoparticles (ZnO NPs). The plants were foliar sprayed with ZnO NP biofertilizer (0, 1, 2 and 3 g L-1) for 20, 40 and 60 days after transplanting. The experiments were performed based on a completely randomized design with five replications. The valerian showed that 3 g L-1 ZnO NPs caused the highest plant height, root length, leaf number per plant, root volume per plant, as well as fresh and dry weights of roots and shoots. The mean values in chicory showed that the plants that were treated with ZnO NPs (3 g L-1) had the highest amount of biomass and photosynthetic pigments. Based on the results of mean values in purple coneflower, ZnO NPs (3 g L-1) caused the largest increase in morphological values. Furthermore, comparing the mean values in the withania showed that the highest plant height, root length, leaf number per plant, root volume per plant, fresh and dry weights of roots and shoots were observed in plants treated with 3 g L-1 ZnO NPs. Therefore, Zn is considered as an essential micronutrient in the growth of these plants and could be prepared in nanosized form.
Afsaneh Rashnoo; Zahra Movahedi; Majid Rostami; Mehdi Ghabooli
Abstract
In two independent experiments, acclimatized chicory plants were transferred into an aeroponic system and to the soil. Then, the effects of biofertilizer (Nitrokara) and culture filtrate of Piriformospora indica were investigated on some plant characteristics in both aeroponic and soil cultivation system ...
Read More
In two independent experiments, acclimatized chicory plants were transferred into an aeroponic system and to the soil. Then, the effects of biofertilizer (Nitrokara) and culture filtrate of Piriformospora indica were investigated on some plant characteristics in both aeroponic and soil cultivation system under greenhouse conditions. The plants were foliar sprayed with three different biofertilizer concentrations (1, 2, and 3 g/L) and P. indica culture filtrate (2.5, 5, and 7.5 mL in 100 mL water) following 20, 40 and 60 days after transplanting to the aeroponic and soil culture media. Results showed that the highest vegetative growth (e.g. plant height, root length, number of leaves per plant, root and shoot dry weights) and physiological traits (e.g. relative water content, proline, anthocyanin content, chlorophyll a, and chlorophyll b) were observed with 7.5 mL of P. indica culture filtrate in both aeroponic and soil culture media. Besides, the best results for all studied traits were obtained from 3 g/L of biofertilizer application in the both culture media. In both experiments, better results were obtained from the aeroponic system than the soil culture for P. indica production.
Masoud Haghshenas; Mohammad Javad Nazarideljou; Akbar Shokoohian
Abstract
The moderating role of salicylic acid (SA) and putrescine (PUS) as plant growth regulators (PGRs), on the growth parameters and phytochemical and qualitative characteristics of strawberry fruit 'Selva' under osmotic stress was investigated under soilless culture. The osmotic potential (salinity) of the ...
Read More
The moderating role of salicylic acid (SA) and putrescine (PUS) as plant growth regulators (PGRs), on the growth parameters and phytochemical and qualitative characteristics of strawberry fruit 'Selva' under osmotic stress was investigated under soilless culture. The osmotic potential (salinity) of the nutrient solution containing different NaCl concentrations (0, 7.5, 15, 30 and 45 mM) and foliar application of PUS (0 and 1.5 mM) and SA (0 and 1.5 mM) were studied. The results showed a significant decrease in plant leaf area (79.6%), total chlorophyll content (48%), fruit yield (73.5%), leaf relative water content (33%), total protein (33.4%), total phenol (7.8%), and vitamin C content (24.5%) under osmotic stress. Moreover, peroxidase (POD) and superoxide dismutase (SOD) enzymes activity, leaf ion leakage, and soluble carbohydrate and proline content increased significantly under osmotic stress. Application of PGRs had a significant effect on all the studied traits (except for SOD activity). Interactive effects of salinity and PGRs were significant on all the traits except for leaf ion leakage, POD activity, soluble carbohydrates, and protein. The highest total phenol and vitamin C contents were obtained with 15 mM salinity along with foliar application of PGRs. In conclusion, foliar application of PUS and SA ameliorate negative effects of salt stress on growth, yield, and quality of strawberry fruit.
